Partial sums of the sequence of prime powers (A000961).

Terms

a(0) =1a(1) =3a(2) =6a(3) =10a(4) =15a(5) =22a(6) =30a(7) =39a(8) =50a(9) =63a(10) =79a(11) =96a(12) =115a(13) =138a(14) =163a(15) =190a(16) =219a(17) =250a(18) =282a(19) =319a(20) =360a(21) =403a(22) =450a(23) =499a(24) =552a(25) =611a(26) =672a(27) =736a(28) =803a(29) =874